Fast Setup Virtual Machine and Symfony

sudo dpkg --configure -a
sudo apt-get install mysql-server
apt-cache pkgnames | grep php7.3
php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
php -r "if (hash_file('sha384', 'composer-setup.php') === 'a5c698ffe4b8e849a443b120cd5ba38043260d5c4023dbf93e1558871f1f07f58274fc6f4c93bcfd858c6bd0775cd8d1') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"
php composer-setup.php
php -r "unlink('composer-setup.php');"
sudo mv composer.phar /usr/local/bin/composer

# run this if you are building a traditional web application

composer create-project symfony/skeleton ./

OR
# run this if you are building a microservice, console application or API

composer create-project symfony/website-skeleton ./

Current folder should be empty!!!

Continue reading “Fast Setup Virtual Machine and Symfony”

RabbitMQ Work Queue with Symfony

Add to .env

RABBITMQ_HOST=localhost
RABBITMQ_PORT=5672
RABBITMQ_USERNAME=test
RABBITMQ_PASSWORD=test
RABBITMQ_QUEUE_NAME=task_queue

Add to services.yaml

App\Command\WorkerCommand:
        arguments: ['%env(RABBITMQ_HOST)%', '%env(RABBITMQ_PORT)%', '%env(RABBITMQ_USERNAME)%', '%env(RABBITMQ_PASSWORD)%', '%env(RABBITMQ_QUEUE_NAME)%']

    App\Command\PublisherCommand:
            arguments: ['%env(RABBITMQ_HOST)%', '%env(RABBITMQ_PORT)%', '%env(RABBITMQ_USERNAME)%', '%env(RABBITMQ_PASSWORD)%', '%env(RABBITMQ_QUEUE_NAME)%']

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Setting up RabbitMQ

First, we need to use composer to install RabbitMQ Server and the PHP package for interfacing with RabbitMQ.

composer require php-amqplib/php-amqplib

sudo apt-key adv --keyserver "hkps.pool.sks-keyservers.net" --recv-keys "0x6B73A36E6026DFCA"
wget -O - "https://github.com/rabbitmq/signing-keys/releases/download/2.0/rabbitmq-release-signing-key.asc" | sudo apt-key add -
sudo apt-get install apt-transport-https
sudo apt-get update -y
sudo apt-get install -y erlang
sudo apt-get update
sudo apt-cache policy
sudo apt-get install -y rabbitmq-server

Create user for rabbitMQ and set permissions
only root can create user

sudo su root 
rabbitmqctl add_user test test
rabbitmqctl set_user_tags test administrator
rabbitmqctl set_permissions -p / test ".*" ".*" ".*"

You can now reach RabbitMQ interface at http://localhost:15672

Install MongoDB in Ubuntu

Create a bash file named install_mongo.bash:

apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 9DA31620334BD75D9DCB49F368818C72E52529D4
echo "deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/4.0 multiverse$
apt-get update
apt-get install -y mongodb-org
sudo systemctl enable mongod
sudo systemctl start mongod

Execute the bash file

sudo bash ./install_mongo.bash

You are ready to use Mongo

Problem with NULL values you should remember

When trying to execute SELECT OR UPDATE query for rows different than a specific value, we should be aware to insert additional statement for null values too.

For Example:

UPDATE account_event 
        SET account_event.assigned_to_id = 2 
        WHERE account_event.status != 1

With this query your goal is to update all rows where account_event.status is different from 1. But if status have null value it wont be updated!
In MySQL all null elements are skipped from comparison and will never be Selected or Updated.

When you have a null fields you should always add additional statement for null like this:

UPDATE account_event 
        SET account_event.assigned_to_id = 2 
        WHERE account_event.status != 1 
        OR account_event.status IS NULL